I am a ittle confused on the fc taillights ...I have an 88 gxl , and wanted to put what I thought were s5 style lights..I bought two parts cars yesterday , an ITS race car , and an 86...both had the s5 style...could imagine a swap on the race car , but not the parts car...anyone have a photo of s5 lights , maybe I am calling the wrong thing ....

 

The S5 tails light up with round lights when you step on the brakes or turn on the headlights. The S4 tails light up with squares/rectangles.
This guy's got both on his car. lol! It's a big pic so I'll just link it.

https://www.rx7club.com/attachments/...n-img_5829.jpg

 

how that was perfect...I was way off ...